About Zembrin
Standardized Sceletium tortuosum extract with dual PDE4 inhibitor and 5-HT reuptake inhibitor activity. A 2023 meta-analysis of 4 studies (117 participants) found no clinical difference vs placebo for anxiety. One acute RCT (25 mg) showed mixed results. Mechanism is well-characterized but clinical evidence for stress/anxiety is minimal.
What Zembrin supports
- Dual PDE4 + serotonin reuptake mechanism
- May reduce acute pre-stress anxiety (1 small RCT, mixed)
How much Zembrin to take
The RDA prevents deficiency. The effective range is what clinical trials used to actually move the outcome.
Effective
8–25
mg
RCTs used 8–25 mg/day. Safety trial used both doses; acute behavioral study used 25 mg single dose.
Clinical evidence
Limited clinical evidence. Meta-analysis of 4 studies (117 participants) found no clinical difference vs placebo for anxiety
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